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Microsoft hit by global outages: What happened and why?

Microsoft hit by global outages: What happened and why?

Also reported by CBS News, Guardian World, France24, BBC Tech, Newsweek, ABC News

Full coverage (7 outlets)

Summary

A global Microsoft outage that began around 16:00 GMT on Thursday disrupted Outlook and partly affected Teams, Copilot, and services that connect to Microsoft products. The disruption continued into Friday, and Microsoft said it was working to restore service while rolling back a network change; it had not identified a root cause and said the outage was not a cyberattack.

Key Facts

  • Users reported problems in 74 countries and territories within about an hour of the outage beginning.
  • Outlook was hit hardest, with users unable to access mailboxes and some emails arriving late.
  • At about 07:00 GMT on Friday, Downdetector had received at least 43,000 Outlook problem reports from users in 72 countries.
  • Microsoft said multiple servers had become unexpectedly unavailable and that increased traffic did not cause the elevated server load.
  • Microsoft reported only marginal success in restoring services more than 12 hours after the outage began.
  • Government systems in Singapore and Japan, the Philippine Supreme Court’s communications, and organisations in Australia were affected.
  • Microsoft said the outage was not caused by a cyberattack and was rolling back a network change, but had not published the root cause.
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